ext4: Return exchanged blocks count to user space in failure
Return exchanged blocks count (moved_len) to user space,
if ext4_move_extents() failed on the way.
Signed-off-by: Akira Fujita <a-fujita@rs.jp.nec.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 7050a9c..c1cdf61 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -243,10 +243,9 @@
me.donor_start, me.len, &me.moved_len);
fput(donor_filp);
- if (!err)
- if (copy_to_user((struct move_extent *)arg,
- &me, sizeof(me)))
- return -EFAULT;
+ if (copy_to_user((struct move_extent *)arg, &me, sizeof(me)))
+ return -EFAULT;
+
return err;
}